My sitemap links are not indexing from google since November 2020?

We have created a website in November 2020. We worked regularly creating 100% unique content. There are about 30 URLs on our site, all with original content. We have configured the google console, submitted the sitemap, and the request to index each link. Also, robots.txt is uploaded to the website and allows the google search engine to index this website. We are waiting since November 2020 for a search result but 90% of URL does not appear in the search engine anywhere. site: bestghostingtools.com We have created many projects and we have never had this problem. I would ask you to give us feedback on this case.

Sitemap: https://besthostingtools.com/sitemap_index.xml
Robots.txt: https://besthostingtools.com/robots.txt